Siemens has published a security advisory for Opcenter Quality that maps seven distinct CVEs affecting SmartClient modules (Opcenter QL Home), SOA Audit and SOA Cockpit — the vulnerabilities range from incorrect authorization and insufficient session expiration to support for legacy TLS...
TL;DR — Microsoft has published a security advisory for CVE-2025-53772: a deserialization vulnerability in Web Deploy (msdeploy) that can allow an authenticated (authorized) user who can reach the Web Deploy endpoint to cause remote code execution on the target server. If you run Web Deploy (the...
When an error message reading "An unexpected error occurred in the WSUS Snap-in" appears on a Windows Server, it often signals a storm brewing beneath seemingly calm admin waters. For IT professionals, encountering a malfunction in the Windows Server Update Services (WSUS) management console can...
When Windows users installed the latest Patch Tuesday update for April 2025, an unexpected and rather bewildering mystery greeted them on their primary drive: a new, empty folder named “inetpub.” While its presence was innocuous at first glance—empty, zero bytes, and seemingly without...
acl permissions
cve-2025-21204
guidance
iis
inetpub folder
malware risks
microsoft patch
patch
powershell
security
security best practices
security patch
system issues
tech news
vulnerability
windows 11
windows security
windows tips
windows update
windows vulnerabilities
Tucked away among the countless cryptic folders of a typical Windows 11 installation lies a new arrival – the now-infamous ‘inetpub’ directory, a seemingly innocuous feature rolled out with the April 2025 security update. But if Windows update history is anything to go by, “innocuous” is just a...
cve vulnerabilities
cve-2025-21204
cyber threat analysis
cyberattack prevention
cybersecurity
cybersecurity best practices
endpoint monitoring
file security
forensics
iis
inetpub
inetpub folder
it professional tips
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kb5055523
malware risks
microsoft
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windows 10
windows 11
windows folder
windows folder risks
windows security
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windows update
windows vulnerabilities
Here is a summary of the original Petri article on the Windows 11 'inetpub' folder security risk:
What happened?
After the April 2025 Patch Tuesday update, a new "inetpub" folder started appearing on Windows 10 and 11 machines.
Microsoft created this folder to help patch a bug (CVE-2025-21204)...
administrative permissions
cve-2025-21204
cyberattack prevention
cybersecurity
cybersecurity best practices
directory junctions
endpoint security
extended security updates
file security
folder permissions
iis
inetpub folder
insider threats
it admin tips
itprotection
junction points
local exploit
malware
malware risks
microsoft
microsoft april 2025 update
microsoft patch
microsoft security
os security
patch management
permission hardening
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security
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symbolic links
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update management
vulnerabilities
vulnerability
windows 10
windows 11
windows defender
windows security
windows servicing
windows system folder
windows system risks
windows update
windows update risks
windows vulnerabilities
The recent Windows 11 24H2 update released in April 2025 has stirred notable interest among users and IT professionals alike due to the unexpected appearance of an empty folder named "inetpub" on the root of the system drive, usually C:. This seemingly innocuous addition has caused confusion as...
cve-2025-21204
extended security updates
iis
inetpub folder
patch management
security
security best practices
security mitigation
security patch
symbolic links
system files
system hardening
system protection
vulnerability
windows 11
windows 11 24h2
windows filesystem
windows update
Microsoft's April 2025 cumulative Windows update, notably identified as KB5055523 for Windows 11 24H2, has stirred significant discussion in the tech community due to an unexpected and somewhat mysterious change: the automatic creation of an empty folder named "inetpub" on the system drive...
cve-2025-21204
cybersecurity
directory junctions
file security
iis
inetpub folder
microsoft patch
microsoft security
patch management
privilege escalation
security
security best practices
security mitigation
security patch
security research
symbolic links
symlink exploits
sysadmin tips
system administration
system files
update management
vulnerabilities
web security
windows 11
windows 11 updates
windows defender
windows security
windows troubleshooting
windows update
windows vulnerabilities
The "inetpub" folder has recently become a focal point of discussion and concern among Windows 11 users following the April 2025 cumulative update (notably KB5055523). Traditionally, "inetpub" is known as the directory used by Microsoft's Internet Information Services (IIS)—a web server platform...
Microsoft's recent April 2025 Patch Tuesday update for Windows 11—specifically update KB5055523—introduced an unexpected yet purposeful change that has stirred curiosity and concern among users and IT professionals alike: the mysterious creation of an empty folder named inetpub on the system...
administrator tips
april 2025 update
computer safety
cve-2025-21204
cybersecurity
denial of service
directory junctions
endpoint security
extended security updates
file security
firewall
folder creation
folder permissions
iis
inetpub
inetpub folder
injury on patch
junction hijacking
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kb5055523
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security
security best practices
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security patch
security research
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symbolic links
symlink exploits
system administration
system files
system integrity
system protection
update issues
update management
vulnerabilities
windows
windows 11
windows filesystem
windows folder
windows management
windows security
windows update
windows vulnerabilities
Microsoft's recent April 2025 patch for Windows introduced a curious and controversial change that has IT administrators and security experts buzzing—a mysterious "inetpub" folder appearing by default on systems, including those not using Internet Information Services (IIS). Far from a mere...
administration tips
administrator tips
cve
cve-2025-21204
cybersecurity
directory junctions
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folder permissions
iis
inetpub folder
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update kb5055523
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vulnerability
web server
windows 10
windows 11
windows defender
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windows permissions
windows security
windows servicing
windows system folder
windows update
windows update policy
windows update risks
windows vulnerabilities
Windows updates continue to keep IT professionals and enthusiasts on their toes. The latest April 2025 cumulative update for Windows 11 (KB5055523) and Windows 10 (KB5055518) has introduced a curious new quirk: an empty “inetpub” folder appearing in the root of the C: drive, even on systems...
administrator
april 2025 update
cve-2025-21204
cyber defense
cyber threats
cybersecurity
denial of service
directory junctions
enterprise security
exploit prevention
file management
file security
folder restoration
iis
inetpub
inetpub folder
it administration
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junction points
kb5055518
kb5055523
malware prevention
microsoft security
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patch
patch management
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patch tuesday 2025
privilege escalation
security
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system patch
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system32
tech news
theory and practice
update kb5055523
update mitigation
vulnerabilities
vulnerability
windows 10
windows 11
windows 11 security risks
windows activation
windows defender
windows filesystem
windows security
windows troubleshooting
windows update
windows updates 2025
windows vulnerabilities
Microsoft’s recent Windows update released in April 2025 has introduced an unexpected and somewhat controversial element to the Windows file system: an empty folder named "inetpub" appearing on many user systems. This update, part of Windows 11 24H2 and Windows 10 cumulative patches (notably...
cve-2025-21204
directory hijacking
directory junctions
file security
iis
inetpub folder
it administration
it security news
microsoft patch
mklink
patch management
security
security alert
security best practices
security patch
security researcher
security updates
symlink exploits
system administration
system files
system folder security
update risks
vulnerability
windows 10
windows 11
windows 2025
windows activation
windows security
windows update
windows vulnerabilities
The creation of the inetpub folder on Windows systems by the April 2025 cumulative update has sparked significant discussion in the Windows community for its dual role as a security measure and a potential vulnerability. Historically, the "C:\inetpub" directory is tied to Microsoft's Internet...
administrator tips
best practices
cve-2025-21204
cybersecurity
directory junctions
file security
filesystem permissions
folder permissions
iisiis folder
inetpub folder
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vulnerabilities
windows 11
windows defender
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windows system folder
windows troubleshooting
windows update
windows vulnerabilities
The recent emergence of the "inetpub" folder in Windows 11 systems has stirred a mix of curiosity and concern among users and IT professionals alike. Introduced as part of Microsoft's April 2025 cumulative update, this seemingly innocuous, empty directory located at the root of the system drive...
april update
cve-2025-21204
cybersecurity
defense in depth
digital rights
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directory junctions
file security
folder permissions
iis
inetpub folder
microsoft patch
microsoft vulnerabilities
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os security
patch management
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security
security best practices
security hardening
security mitigation
security patch
security updates
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symbolic link vulnerability
symbolic links
symlink exploits
sysadmin tips
system administration
system files
system integrity
system protection
system update bypass
update integrity
user rights
windows 11
windows defender
windows exploits
windows security
windows update
windows update risks
windows vulnerabilities
The "inetpub" folder that appeared on your system after the April 2025 Windows 11 update (KB5055523) is not an accidental or superfluous addition. Instead, it is a deliberate and important part of a security patch addressing a specific vulnerability known as CVE-2025-21204. This vulnerability...
cve-2025-21204
file security
ie issues
iis
inetpub folder
layered security
local attack
malware prevention
permissions
privilege escalation
security
security patch
symbolic links
system files
system integrity
system protection
update management
vulnerability
windows 10
windows 11
windows features
windows issues
windows security
windows troubleshooting
windows update
Microsoft’s Mystery inetpub Folder: When the Fix Becomes a Flaw
At the heart of the latest chapter in Windows patching is a familiar folder with an unfamiliar twist—c:\inetpub. The recent kerfuffle that has swept Windows administrators into a maelstrom of head-scratching and risk analysis...
admin security
cve-2025-21204
denial of service
exploit prevention
file security
iis
inetpub
junctions
malicious redirects
microsoft
ntfs
patch failures
patch management
privilege escalation
security best practices
security research
symlinks
vulnerabilities
windows security
windows update
Here’s a summary of the key points from the Petri.com article “Windows 11 ‘inetpub’ Folder May Expose PCs to Security Risks”:
In April 2025, a new “inetpub” folder began appearing on Windows PCs after a Patch Tuesday update.
Microsoft created this folder to fix the CVE-2025-21204 security flaw...
command prompt exploit
cve-2025-21204
cybersecurity
digital safety
iis
inetpub folder
microsoft patch
pc security
security
security flaw
security risks
security updates
symbolic links
update issues
vulnerabilities
windows
windows 11
windows update
windows vulnerabilities
Many users were left scratching their heads after April’s security patches for Windows 10 and Windows 11—specifically KB5055518 and KB5055523—began spurring the mysterious appearance of a brand new “inetpub” folder right on their system drives, even on PCs that had never heard of Internet...
cve-2025-21204
feature updates
iis
inetpub
it administration
microsoft patch
security
system administration
system files
system hardening
vulnerabilities
windows
windows 10
windows 11
windows files
windows server
windows update
If you’ve checked your C: drive recently and spotted a mysterious “inetpub” folder staring back, you’re not alone—and no, you didn’t accidentally sign up for IIS hosting in your sleep. Microsoft’s latest attempt at patching a high-profile security vulnerability has left IT pros and casual users...